26 yearsof experience
2026member since
YD
Yann DEMEL
Transformation · DSI · CTO
CTO / CIO / Head of Enterprise Architecture — Interim & Transition Manager
« Architecte IT senior (26 ans) combinant expertise technique profonde (cloud-native, AI, microservices) et leadership de transformation à l'échelle groupe. Spécialisé en modernisation sans rupture de systèmes critiques (banque, notariat), en reshaping d'organisations IT vers modèles product-driven et en intégration d'IA dans l'ingénierie. Cofondateur de SaaS, capable de piloter à la fois stratégie d'architecture et opérations d'équipes internationales (jusqu'à 25 personnes). »
Track record at a glance
Chief Architecture Officer — Group Architecture Manager, Oddo BHF
The context
Franco-German private bank (wealth management, capital markets). Leadership of group IT architecture across Paris, Tunis, Frankfurt. Cloud-native modernisation (OpenShift, Kafka, PostgreSQL, Vault, GitOps). 100% new developments containerised; 20%+ legacy refactored to microservices.
Outcome
Team of ~20 architects. REST/GraphQL APIs generalised (0→100% new integrations via APIs). Real-time streaming via Kafka (Group Payment Hub, Instant Payments, SEPA, Target2, FX). Customer Master Data workstream (ACPR compliance). AI Marketplace for developers. Platform Teams (OpenShift, Azure) with self-service. Unified observability stack (OpenTelemetry, Prometheus, Loki, Grafana, Tempo) across entire IS. Open-source GitOps tooling (Apache Hop, dbt, Argo). IT process automation (architecture, cybersecurity, network validation) on GitOps platform.
Lead Architect and maintainer, OpenFilz
The context
Personal open-source project (sovereign document management platform). Compatible with full-time assignment. End-to-end product ownership. AGPL v3 / commercial dual licensing (GitLab, Grafana model). Primary go-to-market: native Odoo connector.
Outcome
Open-source platform: design, roadmap, packaging, stewardship. Data sovereignty positioning (on-premise or European hosting via Scaleway). Multi-tenant design with per-org data isolation, horizontal scalability, controlled per-customer infra cost. Full REST/GraphQL APIs + Angular UI. Test coverage >90% (Testcontainers, BDD, E2E). Cloud-native event-driven: Java/Spring WebFlux, Redis Streams, MinIO, OnlyOffice, OpenSearch, PostgreSQL/R2DBC, Keycloak. AI-native: LLM/RAG via Spring AI, MCP server for AI agents.
Chief Digital Officer — Member of the Executive Committee, Director of the software-product programme (notarial ERP), Groupe Cheuvreux
The context
Leading French notarial group. Hired to design and launch a notarial ERP for internal use, then commercial release, in a market locked by 3 vendors (INOT/Kivia, Fiducial Notaires, Fichorga). Mandate: build credible alternative.
Outcome
Pre-study at OCTO Technology, then led execution: PoC, team staffing, MVP, complete software suite (Act Drafting app). Successful ADSN accreditation of modules (liaison with DGFiP): electronic signature (MICEN), electronic publication (Télé@cte). IT master plan & digital strategy (Client Centric, Data Ownership, Process Automation). Budget >€2.5M/year, Executive Committee & Strategic Committee participation. Recruited & managed 12 developers/DevOps + 3 Product Owners/Proxy-POs. Delivered B2B & B2C portals, partner APIs (real estate, property developers), third-party integrations (MS Dynamics), document automation (RPA, AI).
Engagement Director — IT management consulting and digital strategy, OCTO Technology
The context
Architecture and digital transformation consulting firm (acquired by Accenture). Led audit, advisory and due diligence missions for executive management and CIOs. Investment fund experience.
Outcome
Led missions for: BNP Paribas, Société Générale, IPSEN, ErDF, Nexity, TEXA, investment funds. Defined 3 to 5-year IT transformation strategies: target architecture, urbanisation, rationalisation, sourcing, cloud, data. Led delivery & digital transformation engagements (Club Med, Cheuvreux Notaires). Ran Octo Academy trainings on data governance and master data management (Nexity, Leroy Merlin).
CEO and founder, Hi Perf Logic
The context
Software publisher, startup incubated within Microsoft BizSpark. Launched collaborative SaaS platform PCM Cloud (tracking communications, revisable documents, ISO 9001:2008 compliant).
Outcome
Azure deployment, SharePoint integration. Press & investor relations: featured in Le Monde Informatique and Le Parisien.
Lead Architect — Market Data division, Crédit Agricole CIB
The context
Global Equities & Derivatives. Market Data division. 15 developers, 6 Business Analysts.
Outcome
Development, testing and delivery best practices. Refactored critical market data access application. Planned Sophis to Murex migration.
Lead Architect — PnL / Risk division, BNP Paribas Arbitrage
The context
Equities & Derivatives. PnL / Risk division. 20 developers, 10 Business Analysts.
Outcome
Defined target architectures and best practices. Cross-cutting expertise (Java, .Net, Grid computing) on risk and collateral management. Architecture boards, recruitment.
Head of the Basket Trading application, SGCIB
The context
Société Générale, Global Equities & Derivatives. Managed international team.
Outcome
International team of 15 developers and 10 BAs (Paris, London, New York, Hong Kong, Tokyo). MIFID integration, release process industrialisation, recruitment.
Head of Product / R&D — Profinance Back Office software suite, Fimasys
The context
Financial software publisher (acquired by Linedata). R&D leadership of back office suite.
Outcome
Managed 15 developers and 5 Business Analysts. Product roadmap, arbitration between customer-specific development and generic core. Created QA department: release cycle industrialisation, versioning, backward compatibility, installed-base migration campaigns. Clients in France, Germany, UK.
Certifications
ITILPMBOKSAFe
Languages
Allemand · Courant
Anglais · Courant
Français · Bilingue
Education
2000 · BSc Pure Mathematics · Université Paris VIBac+3
2000 · Diplôme d'ingénieur INT Télécom SudParis, spécialité Systèmes distribués et parallèles · Télécom SudParisIngénieur
Preparatory classes MP* · Lycée Louis-le-GrandBac+2
My playing field
Contextes de transformation
Création / Lancement d'activitéIntérim de directionModernisation ITPMO / Gestion de projetRestructuration / RéorganisationTransformation digitale
Domaines d'expertise
Direction générale & StratégieIT & Systèmes d'information
Méthodologies
Autonomie & initiativeEsprit analytiqueGestion du changementLeadership & managementOrientation résultats
Outils & méthodes
Apache HopAWSAzureCamundaClaude Code / AI Agentsdbt CoreDockerGCPGitOps / ArgoCDGrafanaGraphQLHashiCorp VaultJava / SpringJira / ConfluenceKafkaKeycloakKubernetesMCP (Model Context Protocol)Microsoft 365 / SharePointOpenShiftOpenTelemetryPostgreSQLPower BIPrometheusPythonRedisREST APIsRetoolServiceNowSpring AI / LLM/RAGSQLTerraform / OpenTofuTypeScript / Angular
Échelle & périmètre
Entre 50 et 150 ETPFiliale de groupeGroupe / CorporateSociété internationaleStartupSecteur privéSociété cotée
Secteurs
AssuranceBanque & FinanceInformatique & NumériqueServices aux entreprisesTélécommunications
Areas of operation
Home bases
Conflans-Sainte-Honorine (78700)
~1 h au quotidien · jusqu'à ~1 h 30 avec 2 j de télétravail
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